Improvement in mowing-machines



GJWJENNINGS. y

Lawn Mswe.

' Patented March 12, 1861.

* i UNITED STATES PATENT Eric.

I GEORGE W. JENNINGS, OE BOSTON, MASSACHUSETTS.

lHVIFIROVEMENT IN MOWING-IVACHINES.

.To aZZ whom it may. concern,.-

Be it knownthat I, GEORGE W. J ENNINGS, of Boston, county of Suffolk, inthe State of Massachusetts, have invented a new and use#- ful Machinefor Cutting Grass up on Lawns and Small Inelosures; and I do herebydeclare the following to be a full, clear, and correct description ofthe same, reference being had to the accompanying drawings, and to theletters of reference marked thereon.

My invention relates to a grass-cutter with` two saws, each having amotion irr-an opposite direction fromthe other, causing the cutting-vedges to act uponthe grasswith greater velocity than would be the caseif but one were used, as each cutter can be driven withas great rapidityas 'if but one cutterwere em acted upon by groove a in camblock E, f

which is firmly attached to shaft eY e, to.wh'ich the -wheels arealso-fastened, and by whichA it is revolved. VThe cutters are retainedin their place by pins fitted to slots in the cutterplates, as shown -atf, Fig.4 2, and by the plate F F, secured to the body'by screws d d,Fig. 1. The action is as follows: The connection of the under saw, c,being at one point of the camgroove.and that of the upper saw, b, at theopposite point, when c is moved toward b at the same time b moves in -anopposite direction toward c. In so doing they pass each other y andchange places. Consequently the saws are moved in relation to each otherdouble the distance that the connections traverse,'or of one point ofthe cam from another that is, if the throw of the cam is one inch theunder saw will move one inch in one direction while the other saw slidesthe same distance in the opposite di rection, thereby moving the sawstwo inches in their relation to each othein To illustrate further,suppose the teeth to be one inch apart onA each saw, if the points aretogether at commencingl one will move one inch to the Vleft while theother moves one inch to the right, causing the one tooth to pass bythetwo teeth of the other saw, or if ,the teeth are two inches aparttheywill meet, although the I am aware that machines ,have been usedy 'andpatented for cutting grass using substantially the same machinery.Therefore I do not claim, broadly, a machine for thatl purpose; but A 1What I claim as my invention, and desire to secure by Letters Patent,is,-

The arrangement'of the cam-Wheel E, shaft c', driving-wheels BB,bedplate A, and cut-v ters D D', provided with they arms andfriction-rollers b and c, working in the cam-groovel a," the severalparts being combined ,in the' machine and operating in the manner andfor the purpose specified.

GEORGE W. JENNINGS.

